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United States Patent | 5,785,908 |
Bott ,   et al. | July 28, 1998 |
An electric mold clamping mechanism containing a pair of clamping members is activated by an electric motor. The electric motor operates a threaded piston with acme threads which in turn operate a drive plate to extend and retract the clamping members. The clamping members are used to hold a mold plate in an injection molding machine. The clamping members are pivotally attached to a drive plate mechanism and have a surface which mates with a wedge cam to force the clamping member against the mold plate. The stroke of the clamping mechanism is regulated by an amperage draw on the electric motor. A limit switch is used to terminate the end of the retracting stroke. An indicator light is used to indicate the clamping position of the device.
Inventors: | Bott; James A. (Waterford, MI); Tarr; John (Goodrich, MI) |
Assignee: | Incoe Corporation (Troy, MI) |
Appl. No.: | 813519 |
Filed: | March 7, 1997 |
Current U.S. Class: | 264/40.5; 264/219; 264/328.1; 425/150; 425/162; 425/185; 425/192R |
Intern'l Class: | B29C 045/64 |
Field of Search: | 264/40.1,40.5,40.7,219,328.1 425/185,192 R,195,135,136,138,150,162,451.9,595 |
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3465386 | Sep., 1969 | Brown | 425/DIG. |
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4535689 | Aug., 1985 | Putkowski | 425/451. |
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4781568 | Nov., 1988 | Inaba | 425/451. |
4938682 | Jul., 1990 | Kadoriku et al. | 425/451. |
4976602 | Dec., 1990 | Yamazaki | 425/DIG. |
5234332 | Aug., 1993 | Hoenke et al. | 425/451. |
5282732 | Feb., 1994 | Eggert | 425/188. |
5362222 | Nov., 1994 | Faig et al. | 425/589. |
5536159 | Jul., 1996 | Yamamura et al. | 425/150. |
Foreign Patent Documents | |||
2082945 | Mar., 1982 | GB | 425/451. |